Which two numbers should be interchanged to make the given equation correct?
8 × 7 – 42 ÷ 14 × 2 + 21 = 66
1
2 and 7
2
7 and 14
3
14 and 42
4
14 and 21
Which two numbers should be interchanged to make the given equation correct?
8 × 7 – 42 ÷ 14 × 2 + 21 = 66